Flange bearing frog crossing extension casting



FIG. 1 is an upper perspective view of the flange bearing frog crossing extension casting, the lettering on the upper surface being for informational purposes and forming no part of the claimed design;

FIG. 2 is a top plan view of the subject flange bearing frog crossing extension casting;

FIG. 3 is a bottom plan view of the subject flange bearing frog crossing extension casting which is shown in phantom for context only, and forms no part of the claimed design;

FIG. 4 is a left end elevation view of the subject flange bearing frog crossing extension casting;

FIG. 5 is a right end elevation view of the subject flange bearing frog crossing extension casting, opposite said left end;

FIG. 6 is a left side elevation view of the subject flange bearing frog crossing extension casting; and,

FIG. 7 is a right side elevation view of the subject flange bearing frog crossing extension casting, opposite said left side. 

CLAIM The ornamental design for a flange bearing frog crossing extension casting, as shown and described. 